During the party, Becky was introduced to Dr. Selnick.

"Oh doctor", says Becky, sidling up to him, "I'm so glad to meet you. You see I have this problem. Every time I raise my arm above my head, I get a pain in my right side."

"I'm sorry", says Dr. Selnick, "I'm afraid I can't help you. I happen to be a doctor of Economics."

"Well, in that case", says Becky, "tell me, should I sell my IBM shares now?"